题目内容
| 计算 (1)
|
(2)
| ||||||||||||||||
(3)
|
(4)
| ||||||||||||||||
(5)
|
(6)
|
分析:(1)(2)(4)(5)(6)依据分数四则运算顺序,先算第二级运算,再算第一级运算,如果只含有同一级运算,按照从左到右顺序计算,有括号先算括号里面的顺序解答,
(3)运用乘法交换律和结合律解答.
(3)运用乘法交换律和结合律解答.
解答:解:(1)
÷(2+
)×
,
=
÷
×
,
=
×
,
=
;
(2)
×
+
÷
,
=
+
,
=1
;
(3)
×
×
×
,
=(
×
)×(
×
),
=
×
,
=
;
(4)
÷[(
-
)×
],
=
÷[
×
],
=
÷
,
=18;
(5)
+
÷
+
,
=
+
+
,
=
+
,
=2
.
| 3 |
| 4 |
| 3 |
| 4 |
| 2 |
| 11 |
=
| 3 |
| 4 |
| 11 |
| 4 |
| 2 |
| 11 |
=
| 3 |
| 11 |
| 2 |
| 11 |
=
| 6 |
| 121 |
(2)
| 7 |
| 10 |
| 5 |
| 14 |
| 2 |
| 7 |
| 3 |
| 14 |
=
| 1 |
| 4 |
| 4 |
| 3 |
=1
| 7 |
| 12 |
(3)
| 9 |
| 20 |
| 3 |
| 8 |
| 5 |
| 9 |
| 4 |
| 3 |
=(
| 9 |
| 20 |
| 5 |
| 9 |
| 3 |
| 8 |
| 4 |
| 3 |
=
| 1 |
| 4 |
| 1 |
| 2 |
=
| 1 |
| 8 |
(4)
| 27 |
| 8 |
| 1 |
| 3 |
| 1 |
| 4 |
| 9 |
| 4 |
=
| 27 |
| 8 |
| 1 |
| 12 |
| 9 |
| 4 |
=
| 27 |
| 8 |
| 3 |
| 16 |
=18;
(5)
| 4 |
| 7 |
| 5 |
| 9 |
| 4 |
| 7 |
| 11 |
| 8 |
=
| 4 |
| 7 |
| 35 |
| 36 |
| 11 |
| 8 |
=
| 389 |
| 252 |
| 11 |
| 8 |
=2
| 463 |
| 504 |
点评:本题考查知识点:(1)运用分数四则运算顺序正确进行计算,(2)运用乘法交换律和结合律解决问题.
练习册系列答案
相关题目
用竖式计算.
|
(1)55 ×34 |
(2)43 ×29 |
用竖式计算.
|
(1)56 ×34= |
(2)85 ×79= |
|
(3)40 ×38= |
竖式计算.
|
(1)42 ×34= |
(2)140 ×20= |
用竖式计算.
|
(1)56 ×34= |
(2)85 ×79= |
|
(3)40 ×38= |